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1027 palkovsky 1
/*
2071 jermar 2
 * Copyright (c) 2006 Ondrej Palkovsky
1027 palkovsky 3
 * All rights reserved.
4
 *
5
 * Redistribution and use in source and binary forms, with or without
6
 * modification, are permitted provided that the following conditions
7
 * are met:
8
 *
9
 * - Redistributions of source code must retain the above copyright
10
 *   notice, this list of conditions and the following disclaimer.
11
 * - Redistributions in binary form must reproduce the above copyright
12
 *   notice, this list of conditions and the following disclaimer in the
13
 *   documentation and/or other materials provided with the distribution.
14
 * - The name of the author may not be used to endorse or promote products
15
 *   derived from this software without specific prior written permission.
16
 *
17
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27
 */
28
 
1757 jermar 29
/** @addtogroup genericipc
1702 cejka 30
 * @{
31
 */
32
/** @file
33
 */
34
 
1027 palkovsky 35
#include <arch.h>
36
#include <proc/task.h>
1288 jermar 37
#include <proc/thread.h>
1027 palkovsky 38
#include <errno.h>
39
#include <memstr.h>
40
#include <debug.h>
41
#include <ipc/ipc.h>
42
#include <ipc/sysipc.h>
1281 palkovsky 43
#include <ipc/irq.h>
1072 palkovsky 44
#include <ipc/ipcrsc.h>
3445 jermar 45
#include <ipc/kbox.h>
3438 svoboda 46
#include <udebug/udebug_ipc.h>
1258 palkovsky 47
#include <arch/interrupt.h>
1288 jermar 48
#include <syscall/copy.h>
1297 jermar 49
#include <security/cap.h>
1329 palkovsky 50
#include <mm/as.h>
1875 jermar 51
#include <print.h>
1027 palkovsky 52
 
2660 jermar 53
/**
54
 * Maximum buffer size allowed for IPC_M_DATA_WRITE and IPC_M_DATA_READ
55
 * requests.
56
 */
57
#define DATA_XFER_LIMIT     (64 * 1024)
2494 jermar 58
 
2471 jermar 59
#define GET_CHECK_PHONE(phone, phoneid, err) \
60
{ \
61
    if (phoneid > IPC_MAX_PHONES) { \
62
        err; \
63
    } \
64
    phone = &TASK->phones[phoneid]; \
1084 palkovsky 65
}
66
 
2471 jermar 67
#define STRUCT_TO_USPACE(dst, src)  copy_to_uspace(dst, src, sizeof(*(src)))
1084 palkovsky 68
 
2471 jermar 69
/** Decide if the method is a system method.
70
 *
71
 * @param method    Method to be decided.
72
 *
73
 * @return      Return 1 if the method is a system method.
74
 *          Otherwise return 0.
75
 */
2557 jermar 76
static inline int method_is_system(unative_t method)
1040 palkovsky 77
{
78
    if (method <= IPC_M_LAST_SYSTEM)
79
        return 1;
80
    return 0;
81
}
82
 
2471 jermar 83
/** Decide if the message with this method is forwardable.
1040 palkovsky 84
 *
85
 * - some system messages may be forwarded, for some of them
86
 *   it is useless
2471 jermar 87
 *
88
 * @param method    Method to be decided.
89
 *
90
 * @return      Return 1 if the method is forwardable.
91
 *          Otherwise return 0.
1040 palkovsky 92
 */
2557 jermar 93
static inline int method_is_forwardable(unative_t method)
1040 palkovsky 94
{
2494 jermar 95
    switch (method) {
4407 jermar 96
    case IPC_M_CONNECTION_CLONE:
97
    case IPC_M_CONNECT_ME:
2494 jermar 98
    case IPC_M_PHONE_HUNGUP:
99
        /* This message is meant only for the original recipient. */
100
        return 0;
101
    default:
102
        return 1;
103
    }
1040 palkovsky 104
}
105
 
2557 jermar 106
/** Decide if the message with this method is immutable on forward.
107
 *
2601 jermar 108
 * - some system messages may be forwarded but their content cannot be altered
2557 jermar 109
 *
110
 * @param method    Method to be decided.
111
 *
112
 * @return      Return 1 if the method is immutable on forward.
113
 *          Otherwise return 0.
114
 */
115
static inline int method_is_immutable(unative_t method)
116
{
117
    switch (method) {
2677 jermar 118
    case IPC_M_SHARE_OUT:
119
    case IPC_M_SHARE_IN:
2660 jermar 120
    case IPC_M_DATA_WRITE:
121
    case IPC_M_DATA_READ:
2557 jermar 122
        return 1;
123
        break;
124
    default:
125
        return 0;
126
    }
127
}
1027 palkovsky 128
 
2557 jermar 129
 
2471 jermar 130
/***********************************************************************
131
 * Functions that preprocess answer before sending it to the recepient.
132
 ***********************************************************************/
133
 
134
/** Decide if the caller (e.g. ipc_answer()) should save the old call contents
135
 * for answer_preprocess().
136
 *
137
 * @param call      Call structure to be decided.
138
 *
139
 * @return      Return 1 if the old call contents should be saved.
140
 *          Return 0 otherwise.
1027 palkovsky 141
 */
1088 palkovsky 142
static inline int answer_need_old(call_t *call)
1027 palkovsky 143
{
2494 jermar 144
    switch (IPC_GET_METHOD(call->data)) {
4407 jermar 145
    case IPC_M_CONNECTION_CLONE:
146
    case IPC_M_CONNECT_ME:
2494 jermar 147
    case IPC_M_CONNECT_TO_ME:
148
    case IPC_M_CONNECT_ME_TO:
2677 jermar 149
    case IPC_M_SHARE_OUT:
150
    case IPC_M_SHARE_IN:
2660 jermar 151
    case IPC_M_DATA_WRITE:
152
    case IPC_M_DATA_READ:
1027 palkovsky 153
        return 1;
2494 jermar 154
    default:
155
        return 0;
156
    }
1027 palkovsky 157
}
158
 
2471 jermar 159
/** Interpret process answer as control information.
1428 palkovsky 160
 *
2471 jermar 161
 * This function is called directly after sys_ipc_answer().
162
 *
163
 * @param answer    Call structure with the answer.
164
 * @param olddata   Saved data of the request.
165
 *
166
 * @return      Return 0 on success or an error code.
1428 palkovsky 167
 */
1329 palkovsky 168
static inline int answer_preprocess(call_t *answer, ipc_data_t *olddata)
1027 palkovsky 169
{
170
    int phoneid;
171
 
2745 decky 172
    if ((native_t) IPC_GET_RETVAL(answer->data) == EHANGUP) {
1141 palkovsky 173
        /* In case of forward, hangup the forwared phone,
174
         * not the originator
175
         */
3020 jermar 176
        mutex_lock(&answer->data.phone->lock);
1141 palkovsky 177
        spinlock_lock(&TASK->answerbox.lock);
1568 palkovsky 178
        if (answer->data.phone->state == IPC_PHONE_CONNECTED) {
1573 palkovsky 179
            list_remove(&answer->data.phone->link);
1568 palkovsky 180
            answer->data.phone->state = IPC_PHONE_SLAMMED;
1141 palkovsky 181
        }
182
        spinlock_unlock(&TASK->answerbox.lock);
3020 jermar 183
        mutex_unlock(&answer->data.phone->lock);
1088 palkovsky 184
    }
185
 
186
    if (!olddata)
1329 palkovsky 187
        return 0;
1088 palkovsky 188
 
4407 jermar 189
    if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECTION_CLONE) {
190
        phoneid = IPC_GET_ARG1(*olddata);
191
        phone_t *phone = &TASK->phones[phoneid];
192
        if (IPC_GET_RETVAL(answer->data) != EOK) {
193
            /*
194
             * The recipient of the cloned phone rejected the offer.
195
             * In this case, the connection was established at the
196
             * request time and therefore we need to slam the phone.
197
             * We don't merely hangup as that would result in
198
             * sending IPC_M_HUNGUP to the third party on the
199
             * other side of the cloned phone.
200
             */
201
            mutex_lock(&phone->lock);
202
            if (phone->state == IPC_PHONE_CONNECTED) {
203
                spinlock_lock(&phone->callee->lock);
204
                list_remove(&phone->link);
205
                phone->state = IPC_PHONE_SLAMMED;
206
                spinlock_unlock(&phone->callee->lock);
207
            }
208
            mutex_unlock(&phone->lock);
209
        }
210
    } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME) {
211
        phone_t *phone = (phone_t *)IPC_GET_ARG5(*olddata);
212
        if (IPC_GET_RETVAL(answer->data) != EOK) {
213
            /*
214
             * The other party on the cloned phoned rejected our
215
             * request for connection on the protocol level.
216
             * We need to break the connection without sending
217
             * IPC_M_HUNGUP back.
218
             */
219
            mutex_lock(&phone->lock);
220
            if (phone->state == IPC_PHONE_CONNECTED) {
221
                spinlock_lock(&phone->callee->lock);
222
                list_remove(&phone->link);
223
                phone->state = IPC_PHONE_SLAMMED;
224
                spinlock_unlock(&phone->callee->lock);
225
            }
226
            mutex_unlock(&phone->lock);
227
        }
228
    } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_TO_ME) {
2637 cejka 229
        phoneid = IPC_GET_ARG5(*olddata);
4407 jermar 230
        if (IPC_GET_RETVAL(answer->data) != EOK) {
1027 palkovsky 231
            /* The connection was not accepted */
232
            phone_dealloc(phoneid);
1040 palkovsky 233
        } else {
1090 palkovsky 234
            /* The connection was accepted */
2359 jermar 235
            phone_connect(phoneid, &answer->sender->answerbox);
2638 jermar 236
            /* Set 'phone hash' as arg5 of response */
2637 cejka 237
            IPC_SET_ARG5(answer->data,
2359 jermar 238
                (unative_t) &TASK->phones[phoneid]);
1027 palkovsky 239
        }
1086 palkovsky 240
    } else if (IPC_GET_METHOD(*olddata) == IPC_M_CONNECT_ME_TO) {
1060 palkovsky 241
        /* If the users accepted call, connect */
4407 jermar 242
        if (IPC_GET_RETVAL(answer->data) == EOK) {
2635 cejka 243
            ipc_phone_connect((phone_t *) IPC_GET_ARG5(*olddata),
2359 jermar 244
                &TASK->answerbox);
1060 palkovsky 245
        }
2677 jermar 246
    } else if (IPC_GET_METHOD(*olddata) == IPC_M_SHARE_OUT) {
2359 jermar 247
        if (!IPC_GET_RETVAL(answer->data)) {
248
            /* Accepted, handle as_area receipt */
1413 jermar 249
            ipl_t ipl;
1461 palkovsky 250
            int rc;
1413 jermar 251
            as_t *as;
252
 
253
            ipl = interrupts_disable();
254
            spinlock_lock(&answer->sender->lock);
255
            as = answer->sender->as;
256
            spinlock_unlock(&answer->sender->lock);
257
            interrupts_restore(ipl);
258
 
2359 jermar 259
            rc = as_area_share(as, IPC_GET_ARG1(*olddata),
260
                IPC_GET_ARG2(*olddata), AS,
261
                IPC_GET_ARG1(answer->data), IPC_GET_ARG3(*olddata));
1461 palkovsky 262
            IPC_SET_RETVAL(answer->data, rc);
263
            return rc;
1329 palkovsky 264
        }
2677 jermar 265
    } else if (IPC_GET_METHOD(*olddata) == IPC_M_SHARE_IN) {
1428 palkovsky 266
        if (!IPC_GET_RETVAL(answer->data)) {
267
            ipl_t ipl;
268
            as_t *as;
1434 palkovsky 269
            int rc;
1428 palkovsky 270
 
271
            ipl = interrupts_disable();
272
            spinlock_lock(&answer->sender->lock);
273
            as = answer->sender->as;
274
            spinlock_unlock(&answer->sender->lock);
275
            interrupts_restore(ipl);
276
 
2359 jermar 277
            rc = as_area_share(AS, IPC_GET_ARG1(answer->data),
278
                IPC_GET_ARG2(*olddata), as, IPC_GET_ARG1(*olddata),
279
                IPC_GET_ARG2(answer->data));
1434 palkovsky 280
            IPC_SET_RETVAL(answer->data, rc);
1428 palkovsky 281
        }
2662 jermar 282
    } else if (IPC_GET_METHOD(*olddata) == IPC_M_DATA_READ) {
283
        ASSERT(!answer->buffer);
284
        if (!IPC_GET_RETVAL(answer->data)) {
285
            /* The recipient agreed to send data. */
286
            uintptr_t src = IPC_GET_ARG1(answer->data);
287
            uintptr_t dst = IPC_GET_ARG1(*olddata);
288
            size_t max_size = IPC_GET_ARG2(*olddata);
289
            size_t size = IPC_GET_ARG2(answer->data);
2934 jermar 290
            if (size && size <= max_size) {
2662 jermar 291
                /*
292
                 * Copy the destination VA so that this piece of
293
                 * information is not lost.
294
                 */
295
                IPC_SET_ARG1(answer->data, dst);
296
 
297
                answer->buffer = malloc(size, 0);
298
                int rc = copy_from_uspace(answer->buffer,
299
                    (void *) src, size);
300
                if (rc) {
301
                    IPC_SET_RETVAL(answer->data, rc);
302
                    free(answer->buffer);
303
                    answer->buffer = NULL;
304
                }
2934 jermar 305
            } else if (!size) {
306
                IPC_SET_RETVAL(answer->data, EOK);
2662 jermar 307
            } else {
308
                IPC_SET_RETVAL(answer->data, ELIMIT);
309
            }
310
        }
2660 jermar 311
    } else if (IPC_GET_METHOD(*olddata) == IPC_M_DATA_WRITE) {
2661 jermar 312
        ASSERT(answer->buffer);
2494 jermar 313
        if (!IPC_GET_RETVAL(answer->data)) {
2662 jermar 314
            /* The recipient agreed to receive data. */
2494 jermar 315
            int rc;
316
            uintptr_t dst;
3332 jermar 317
            size_t size;
318
            size_t max_size;
2494 jermar 319
 
3332 jermar 320
            dst = (uintptr_t)IPC_GET_ARG1(answer->data);
321
            size = (size_t)IPC_GET_ARG2(answer->data);
322
            max_size = (size_t)IPC_GET_ARG2(*olddata);
2494 jermar 323
 
2662 jermar 324
            if (size <= max_size) {
325
                rc = copy_to_uspace((void *) dst,
326
                    answer->buffer, size);
327
                if (rc)
328
                    IPC_SET_RETVAL(answer->data, rc);
329
            } else {
330
                IPC_SET_RETVAL(answer->data, ELIMIT);
331
            }
2494 jermar 332
        }
2661 jermar 333
        free(answer->buffer);
334
        answer->buffer = NULL;
1027 palkovsky 335
    }
1329 palkovsky 336
    return 0;
1027 palkovsky 337
}
338
 
2471 jermar 339
/** Called before the request is sent.
1090 palkovsky 340
 *
2471 jermar 341
 * @param call      Call structure with the request.
3438 svoboda 342
 * @param phone     Phone that the call will be sent through.
2471 jermar 343
 *
344
 * @return      Return 0 on success, ELIMIT or EPERM on error.
1090 palkovsky 345
 */
3438 svoboda 346
static int request_preprocess(call_t *call, phone_t *phone)
1090 palkovsky 347
{
348
    int newphid;
1329 palkovsky 349
    size_t size;
2494 jermar 350
    uintptr_t src;
351
    int rc;
1090 palkovsky 352
 
353
    switch (IPC_GET_METHOD(call->data)) {
4407 jermar 354
    case IPC_M_CONNECTION_CLONE: {
355
        phone_t *cloned_phone;
356
        GET_CHECK_PHONE(cloned_phone, IPC_GET_ARG1(call->data),
357
            return ENOENT);
358
        if (cloned_phone < phone) {
359
            mutex_lock(&cloned_phone->lock);
360
            mutex_lock(&phone->lock);
4430 jermar 361
        } else if (cloned_phone > phone) {
362
            mutex_lock(&phone->lock);
363
            mutex_lock(&cloned_phone->lock);
4407 jermar 364
        } else {
365
            mutex_lock(&phone->lock);
366
        }
367
        if ((cloned_phone->state != IPC_PHONE_CONNECTED) ||
368
            phone->state != IPC_PHONE_CONNECTED) {
4430 jermar 369
            if (cloned_phone != phone)
370
                mutex_unlock(&cloned_phone->lock);
4407 jermar 371
            mutex_unlock(&phone->lock);
372
            return EINVAL;
373
        }
374
        /*
375
         * We can be pretty sure now that both tasks exist and we are
376
         * connected to them. As we continue to hold the phone locks,
377
         * we are effectively preventing them from finishing their
378
         * potential cleanup.
379
         */
380
        newphid = phone_alloc(phone->callee->task);
381
        if (newphid < 0) {
4430 jermar 382
            if (cloned_phone != phone)
383
                mutex_unlock(&cloned_phone->lock);
4407 jermar 384
            mutex_unlock(&phone->lock);
385
            return ELIMIT;
386
        }
387
        ipc_phone_connect(&phone->callee->task->phones[newphid],
388
            cloned_phone->callee);
4430 jermar 389
        if (cloned_phone != phone)
390
            mutex_unlock(&cloned_phone->lock);
4407 jermar 391
        mutex_unlock(&phone->lock);
392
        /* Set the new phone for the callee. */
393
        IPC_SET_ARG1(call->data, newphid);
394
        break;
395
    }
396
    case IPC_M_CONNECT_ME:
397
        IPC_SET_ARG5(call->data, (unative_t) phone);
398
        break;
1090 palkovsky 399
    case IPC_M_CONNECT_ME_TO:
4407 jermar 400
        newphid = phone_alloc(TASK);
1090 palkovsky 401
        if (newphid < 0)
402
            return ELIMIT;
2638 jermar 403
        /* Set arg5 for server */
2635 cejka 404
        IPC_SET_ARG5(call->data, (unative_t) &TASK->phones[newphid]);
1090 palkovsky 405
        call->flags |= IPC_CALL_CONN_ME_TO;
2098 decky 406
        call->priv = newphid;
1090 palkovsky 407
        break;
2677 jermar 408
    case IPC_M_SHARE_OUT:
2556 jermar 409
        size = as_area_get_size(IPC_GET_ARG1(call->data));
2471 jermar 410
        if (!size)
1329 palkovsky 411
            return EPERM;
1417 jermar 412
        IPC_SET_ARG2(call->data, size);
1329 palkovsky 413
        break;
2662 jermar 414
    case IPC_M_DATA_READ:
415
        size = IPC_GET_ARG2(call->data);
416
        if ((size <= 0 || (size > DATA_XFER_LIMIT)))
417
            return ELIMIT;
418
        break;
2660 jermar 419
    case IPC_M_DATA_WRITE:
2676 jermar 420
        src = IPC_GET_ARG1(call->data);
421
        size = IPC_GET_ARG2(call->data);
2494 jermar 422
 
4304 jermar 423
        if (size > DATA_XFER_LIMIT)
2494 jermar 424
            return ELIMIT;
425
 
426
        call->buffer = (uint8_t *) malloc(size, 0);
427
        rc = copy_from_uspace(call->buffer, (void *) src, size);
428
        if (rc != 0) {
429
            free(call->buffer);
430
            return rc;
431
        }
432
        break;
3438 svoboda 433
#ifdef CONFIG_UDEBUG
434
    case IPC_M_DEBUG_ALL:
435
        return udebug_request_preprocess(call, phone);
436
#endif
1090 palkovsky 437
    default:
438
        break;
439
    }
440
    return 0;
441
}
442
 
2471 jermar 443
/*******************************************************************************
444
 * Functions called to process received call/answer before passing it to uspace.
445
 *******************************************************************************/
446
 
447
/** Do basic kernel processing of received call answer.
448
 *
449
 * @param call      Call structure with the answer.
1027 palkovsky 450
 */
1090 palkovsky 451
static void process_answer(call_t *call)
1027 palkovsky 452
{
2745 decky 453
    if (((native_t) IPC_GET_RETVAL(call->data) == EHANGUP) &&
2359 jermar 454
        (call->flags & IPC_CALL_FORWARDED))
1088 palkovsky 455
        IPC_SET_RETVAL(call->data, EFORWARD);
1090 palkovsky 456
 
457
    if (call->flags & IPC_CALL_CONN_ME_TO) {
458
        if (IPC_GET_RETVAL(call->data))
2098 decky 459
            phone_dealloc(call->priv);
1090 palkovsky 460
        else
2635 cejka 461
            IPC_SET_ARG5(call->data, call->priv);
1090 palkovsky 462
    }
2662 jermar 463
 
464
    if (call->buffer) {
465
        /* This must be an affirmative answer to IPC_M_DATA_READ. */
3438 svoboda 466
        /* or IPC_M_DEBUG_ALL/UDEBUG_M_MEM_READ... */
2662 jermar 467
        uintptr_t dst = IPC_GET_ARG1(call->data);
468
        size_t size = IPC_GET_ARG2(call->data);
469
        int rc = copy_to_uspace((void *) dst, call->buffer, size);
470
        if (rc)
471
            IPC_SET_RETVAL(call->data, rc);
472
        free(call->buffer);
473
        call->buffer = NULL;
474
    }
1027 palkovsky 475
}
476
 
2471 jermar 477
/** Do basic kernel processing of received call request.
1027 palkovsky 478
 *
2471 jermar 479
 * @param box       Destination answerbox structure.
480
 * @param call      Call structure with the request.
481
 *
482
 * @return      Return 0 if the call should be passed to userspace.
483
 *          Return -1 if the call should be ignored.
1027 palkovsky 484
 */
2359 jermar 485
static int process_request(answerbox_t *box, call_t *call)
1027 palkovsky 486
{
487
    int phoneid;
488
 
1086 palkovsky 489
    if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME) {
4407 jermar 490
        phoneid = phone_alloc(TASK);
1027 palkovsky 491
        if (phoneid < 0) { /* Failed to allocate phone */
492
            IPC_SET_RETVAL(call->data, ELIMIT);
2471 jermar 493
            ipc_answer(box, call);
1027 palkovsky 494
            return -1;
495
        }
2637 cejka 496
        IPC_SET_ARG5(call->data, phoneid);
3438 svoboda 497
    }
498
    switch (IPC_GET_METHOD(call->data)) {
499
    case IPC_M_DEBUG_ALL:
500
        return -1;
501
    default:
502
        break;
503
    }
1027 palkovsky 504
    return 0;
505
}
506
 
2471 jermar 507
/** Make a fast call over IPC, wait for reply and return to user.
1027 palkovsky 508
 *
2615 jermar 509
 * This function can handle only three arguments of payload, but is faster than
510
 * the generic function (i.e. sys_ipc_call_sync_slow()).
2471 jermar 511
 *
512
 * @param phoneid   Phone handle for the call.
513
 * @param method    Method of the call.
514
 * @param arg1      Service-defined payload argument.
2615 jermar 515
 * @param arg2      Service-defined payload argument.
516
 * @param arg3      Service-defined payload argument.
2471 jermar 517
 * @param data      Address of userspace structure where the reply call will
518
 *          be stored.
519
 *
520
 * @return      Returns 0 on success.
521
 *          Return ENOENT if there is no such phone handle.
1027 palkovsky 522
 */
2359 jermar 523
unative_t sys_ipc_call_sync_fast(unative_t phoneid, unative_t method,
2615 jermar 524
    unative_t arg1, unative_t arg2, unative_t arg3, ipc_data_t *data)
1027 palkovsky 525
{
526
    call_t call;
527
    phone_t *phone;
1090 palkovsky 528
    int res;
2617 jermar 529
    int rc;
3054 decky 530
 
1084 palkovsky 531
    GET_CHECK_PHONE(phone, phoneid, return ENOENT);
1027 palkovsky 532
 
1084 palkovsky 533
    ipc_call_static_init(&call);
1027 palkovsky 534
    IPC_SET_METHOD(call.data, method);
535
    IPC_SET_ARG1(call.data, arg1);
2615 jermar 536
    IPC_SET_ARG2(call.data, arg2);
537
    IPC_SET_ARG3(call.data, arg3);
2620 jermar 538
    /*
539
     * To achieve deterministic behavior, zero out arguments that are beyond
540
     * the limits of the fast version.
541
     */
542
    IPC_SET_ARG4(call.data, 0);
543
    IPC_SET_ARG5(call.data, 0);
1027 palkovsky 544
 
3438 svoboda 545
    if (!(res = request_preprocess(&call, phone))) {
3603 svoboda 546
#ifdef CONFIG_UDEBUG
547
        udebug_stoppable_begin();
548
#endif
3370 jermar 549
        rc = ipc_call_sync(phone, &call);
3603 svoboda 550
#ifdef CONFIG_UDEBUG
551
        udebug_stoppable_end();
552
#endif
3370 jermar 553
        if (rc != EOK)
554
            return rc;
1090 palkovsky 555
        process_answer(&call);
3603 svoboda 556
 
2471 jermar 557
    } else {
1090 palkovsky 558
        IPC_SET_RETVAL(call.data, res);
2471 jermar 559
    }
2617 jermar 560
    rc = STRUCT_TO_USPACE(&data->args, &call.data.args);
561
    if (rc != 0)
562
        return rc;
1027 palkovsky 563
 
564
    return 0;
565
}
566
 
2471 jermar 567
/** Make a synchronous IPC call allowing to transmit the entire payload.
568
 *
569
 * @param phoneid   Phone handle for the call.
570
 * @param question  Userspace address of call data with the request.
2494 jermar 571
 * @param reply     Userspace address of call data where to store the
572
 *          answer.
2471 jermar 573
 *
574
 * @return      Zero on success or an error code.
575
 */
2615 jermar 576
unative_t sys_ipc_call_sync_slow(unative_t phoneid, ipc_data_t *question,
2359 jermar 577
    ipc_data_t *reply)
1027 palkovsky 578
{
579
    call_t call;
580
    phone_t *phone;
1090 palkovsky 581
    int res;
1288 jermar 582
    int rc;
1027 palkovsky 583
 
1084 palkovsky 584
    ipc_call_static_init(&call);
2359 jermar 585
    rc = copy_from_uspace(&call.data.args, &question->args,
586
        sizeof(call.data.args));
1288 jermar 587
    if (rc != 0)
1780 jermar 588
        return (unative_t) rc;
1040 palkovsky 589
 
1084 palkovsky 590
    GET_CHECK_PHONE(phone, phoneid, return ENOENT);
1072 palkovsky 591
 
3438 svoboda 592
    if (!(res = request_preprocess(&call, phone))) {
3603 svoboda 593
#ifdef CONFIG_UDEBUG
594
        udebug_stoppable_begin();
595
#endif
3370 jermar 596
        rc = ipc_call_sync(phone, &call);
3603 svoboda 597
#ifdef CONFIG_UDEBUG
598
        udebug_stoppable_end();
599
#endif
3370 jermar 600
        if (rc != EOK)
601
            return rc;
1090 palkovsky 602
        process_answer(&call);
603
    } else
604
        IPC_SET_RETVAL(call.data, res);
1027 palkovsky 605
 
1288 jermar 606
    rc = STRUCT_TO_USPACE(&reply->args, &call.data.args);
607
    if (rc != 0)
608
        return rc;
1027 palkovsky 609
 
610
    return 0;
611
}
612
 
2471 jermar 613
/** Check that the task did not exceed the allowed limit of asynchronous calls.
1027 palkovsky 614
 *
2471 jermar 615
 * @return      Return 0 if limit not reached or -1 if limit exceeded.
1027 palkovsky 616
 */
617
static int check_call_limit(void)
618
{
619
    if (atomic_preinc(&TASK->active_calls) > IPC_MAX_ASYNC_CALLS) {
620
        atomic_dec(&TASK->active_calls);
621
        return -1;
622
    }
623
    return 0;
624
}
625
 
2471 jermar 626
/** Make a fast asynchronous call over IPC.
1027 palkovsky 627
 *
2618 jermar 628
 * This function can only handle four arguments of payload, but is faster than
629
 * the generic function sys_ipc_call_async_slow().
2471 jermar 630
 *
631
 * @param phoneid   Phone handle for the call.
632
 * @param method    Method of the call.
633
 * @param arg1      Service-defined payload argument.
634
 * @param arg2      Service-defined payload argument.
2618 jermar 635
 * @param arg3      Service-defined payload argument.
636
 * @param arg4      Service-defined payload argument.
2471 jermar 637
 *
638
 * @return      Return call hash on success.
639
 *          Return IPC_CALLRET_FATAL in case of a fatal error and
640
 *          IPC_CALLRET_TEMPORARY if there are too many pending
641
 *          asynchronous requests; answers should be handled first.
1027 palkovsky 642
 */
2359 jermar 643
unative_t sys_ipc_call_async_fast(unative_t phoneid, unative_t method,
2618 jermar 644
    unative_t arg1, unative_t arg2, unative_t arg3, unative_t arg4)
1027 palkovsky 645
{
646
    call_t *call;
647
    phone_t *phone;
1090 palkovsky 648
    int res;
1027 palkovsky 649
 
650
    if (check_call_limit())
651
        return IPC_CALLRET_TEMPORARY;
652
 
1090 palkovsky 653
    GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);
1072 palkovsky 654
 
1258 palkovsky 655
    call = ipc_call_alloc(0);
1027 palkovsky 656
    IPC_SET_METHOD(call->data, method);
657
    IPC_SET_ARG1(call->data, arg1);
658
    IPC_SET_ARG2(call->data, arg2);
2618 jermar 659
    IPC_SET_ARG3(call->data, arg3);
660
    IPC_SET_ARG4(call->data, arg4);
2620 jermar 661
    /*
662
     * To achieve deterministic behavior, zero out arguments that are beyond
663
     * the limits of the fast version.
664
     */
665
    IPC_SET_ARG5(call->data, 0);
1027 palkovsky 666
 
3438 svoboda 667
    if (!(res = request_preprocess(call, phone)))
1090 palkovsky 668
        ipc_call(phone, call);
669
    else
670
        ipc_backsend_err(phone, call, res);
1027 palkovsky 671
 
1780 jermar 672
    return (unative_t) call;
1027 palkovsky 673
}
674
 
2471 jermar 675
/** Make an asynchronous IPC call allowing to transmit the entire payload.
1027 palkovsky 676
 *
2471 jermar 677
 * @param phoneid   Phone handle for the call.
678
 * @param data      Userspace address of call data with the request.
679
 *
680
 * @return      See sys_ipc_call_async_fast().
1027 palkovsky 681
 */
2618 jermar 682
unative_t sys_ipc_call_async_slow(unative_t phoneid, ipc_data_t *data)
1027 palkovsky 683
{
684
    call_t *call;
685
    phone_t *phone;
1090 palkovsky 686
    int res;
1288 jermar 687
    int rc;
1027 palkovsky 688
 
1072 palkovsky 689
    if (check_call_limit())
690
        return IPC_CALLRET_TEMPORARY;
691
 
1090 palkovsky 692
    GET_CHECK_PHONE(phone, phoneid, return IPC_CALLRET_FATAL);
1027 palkovsky 693
 
1258 palkovsky 694
    call = ipc_call_alloc(0);
2359 jermar 695
    rc = copy_from_uspace(&call->data.args, &data->args,
696
        sizeof(call->data.args));
1293 palkovsky 697
    if (rc != 0) {
698
        ipc_call_free(call);
1780 jermar 699
        return (unative_t) rc;
1293 palkovsky 700
    }
3438 svoboda 701
    if (!(res = request_preprocess(call, phone)))
1090 palkovsky 702
        ipc_call(phone, call);
703
    else
704
        ipc_backsend_err(phone, call, res);
1040 palkovsky 705
 
1780 jermar 706
    return (unative_t) call;
1027 palkovsky 707
}
708
 
3819 jermar 709
/** Forward a received call to another destination - common code for both the
710
 * fast and the slow version.
1040 palkovsky 711
 *
2471 jermar 712
 * @param callid    Hash of the call to forward.
713
 * @param phoneid   Phone handle to use for forwarding.
714
 * @param method    New method to use for the forwarded call.
715
 * @param arg1      New value of the first argument for the forwarded call.
2636 jermar 716
 * @param arg2      New value of the second argument for the forwarded call.
3819 jermar 717
 * @param arg3      New value of the third argument for the forwarded call.
718
 * @param arg4      New value of the fourth argument for the forwarded call.
719
 * @param arg5      New value of the fifth argument for the forwarded call.
2622 jermar 720
 * @param mode      Flags that specify mode of the forward operation.
3819 jermar 721
 * @param slow      If true, arg3, arg4 and arg5 are considered. Otherwise
722
 *          the function considers only the fast version arguments:
723
 *          i.e. arg1 and arg2.
1060 palkovsky 724
 *
2471 jermar 725
 * @return      Return 0 on succes, otherwise return an error code.
726
 *
3819 jermar 727
 * Warning: Make sure that ARG5 is not rewritten for certain system IPC
1040 palkovsky 728
 */
3819 jermar 729
static unative_t sys_ipc_forward_common(unative_t callid, unative_t phoneid,
730
    unative_t method, unative_t arg1, unative_t arg2, unative_t arg3,
731
    unative_t arg4, unative_t arg5, int mode, bool slow)
1040 palkovsky 732
{
733
    call_t *call;
734
    phone_t *phone;
735
 
736
    call = get_call(callid);
737
    if (!call)
738
        return ENOENT;
3819 jermar 739
 
1088 palkovsky 740
    call->flags |= IPC_CALL_FORWARDED;
741
 
1084 palkovsky 742
    GET_CHECK_PHONE(phone, phoneid, {
1040 palkovsky 743
        IPC_SET_RETVAL(call->data, EFORWARD);
744
        ipc_answer(&TASK->answerbox, call);
745
        return ENOENT;
3054 decky 746
    });
1040 palkovsky 747
 
2557 jermar 748
    if (!method_is_forwardable(IPC_GET_METHOD(call->data))) {
1040 palkovsky 749
        IPC_SET_RETVAL(call->data, EFORWARD);
750
        ipc_answer(&TASK->answerbox, call);
751
        return EPERM;
752
    }
753
 
2557 jermar 754
    /*
755
     * Userspace is not allowed to change method of system methods on
3819 jermar 756
     * forward, allow changing ARG1, ARG2, ARG3 and ARG4 by means of method,
757
     * arg1, arg2 and arg3.
2557 jermar 758
     * If the method is immutable, don't change anything.
1040 palkovsky 759
     */
2557 jermar 760
    if (!method_is_immutable(IPC_GET_METHOD(call->data))) {
761
        if (method_is_system(IPC_GET_METHOD(call->data))) {
762
            if (IPC_GET_METHOD(call->data) == IPC_M_CONNECT_TO_ME)
2635 cejka 763
                phone_dealloc(IPC_GET_ARG5(call->data));
1090 palkovsky 764
 
2557 jermar 765
            IPC_SET_ARG1(call->data, method);
766
            IPC_SET_ARG2(call->data, arg1);
2635 cejka 767
            IPC_SET_ARG3(call->data, arg2);
3819 jermar 768
            if (slow) {
769
                IPC_SET_ARG4(call->data, arg3);
770
                /*
771
                 * For system methods we deliberately don't
772
                 * overwrite ARG5.
773
                 */
774
            }
2557 jermar 775
        } else {
776
            IPC_SET_METHOD(call->data, method);
777
            IPC_SET_ARG1(call->data, arg1);
2635 cejka 778
            IPC_SET_ARG2(call->data, arg2);
3819 jermar 779
            if (slow) {
780
                IPC_SET_ARG3(call->data, arg3);
781
                IPC_SET_ARG4(call->data, arg4);
782
                IPC_SET_ARG5(call->data, arg5);
783
            }
2557 jermar 784
        }
1040 palkovsky 785
    }
786
 
2622 jermar 787
    return ipc_forward(call, phone, &TASK->answerbox, mode);
1040 palkovsky 788
}
789
 
3819 jermar 790
/** Forward a received call to another destination - fast version.
791
 *
792
 * @param callid    Hash of the call to forward.
793
 * @param phoneid   Phone handle to use for forwarding.
794
 * @param method    New method to use for the forwarded call.
795
 * @param arg1      New value of the first argument for the forwarded call.
796
 * @param arg2      New value of the second argument for the forwarded call.
797
 * @param mode      Flags that specify mode of the forward operation.
798
 *
799
 * @return      Return 0 on succes, otherwise return an error code.
800
 *
801
 * In case the original method is a system method, ARG1, ARG2 and ARG3 are
802
 * overwritten in the forwarded message with the new method and the new
803
 * arg1 and arg2, respectively. Otherwise the METHOD, ARG1 and ARG2 are
804
 * rewritten with the new method, arg1 and arg2, respectively. Also note there
805
 * is a set of immutable methods, for which the new method and arguments are not
806
 * set and these values are ignored.
807
 */
808
unative_t sys_ipc_forward_fast(unative_t callid, unative_t phoneid,
809
    unative_t method, unative_t arg1, unative_t arg2, int mode)
810
{
811
    return sys_ipc_forward_common(callid, phoneid, method, arg1, arg2, 0, 0,
812
        0, mode, false);
813
}
814
 
815
/** Forward a received call to another destination - slow version.
816
 *
817
 * @param callid    Hash of the call to forward.
818
 * @param phoneid   Phone handle to use for forwarding.
819
 * @param data      Userspace address of the new IPC data.
820
 * @param mode      Flags that specify mode of the forward operation.
821
 *
822
 * @return      Return 0 on succes, otherwise return an error code.
823
 *
824
 * This function is the slow verision of the sys_ipc_forward_fast interface.
825
 * It can copy all five new arguments and the new method from the userspace.
826
 * It naturally extends the functionality of the fast version. For system
827
 * methods, it additionally stores the new value of arg3 to ARG4. For non-system
828
 * methods, it additionally stores the new value of arg3, arg4 and arg5,
829
 * respectively, to ARG3, ARG4 and ARG5, respectively.
830
 */
831
unative_t sys_ipc_forward_slow(unative_t callid, unative_t phoneid,
832
    ipc_data_t *data, int mode)
833
{
834
    ipc_data_t newdata;
835
    int rc;
836
 
837
    rc = copy_from_uspace(&newdata.args, &data->args,
838
        sizeof(newdata.args));
839
    if (rc != 0)
840
        return (unative_t) rc;
841
 
842
    return sys_ipc_forward_common(callid, phoneid,
843
        IPC_GET_METHOD(newdata), IPC_GET_ARG1(newdata),
844
        IPC_GET_ARG2(newdata), IPC_GET_ARG3(newdata),
845
        IPC_GET_ARG4(newdata), IPC_GET_ARG5(newdata), mode, true);
846
}
847
 
2471 jermar 848
/** Answer an IPC call - fast version.
849
 *
850
 * This function can handle only two return arguments of payload, but is faster
851
 * than the generic sys_ipc_answer().
852
 *
853
 * @param callid    Hash of the call to be answered.
854
 * @param retval    Return value of the answer.
855
 * @param arg1      Service-defined return value.
856
 * @param arg2      Service-defined return value.
2619 jermar 857
 * @param arg3      Service-defined return value.
858
 * @param arg4      Service-defined return value.
2471 jermar 859
 *
860
 * @return      Return 0 on success, otherwise return an error code.   
861
 */
2359 jermar 862
unative_t sys_ipc_answer_fast(unative_t callid, unative_t retval,
2619 jermar 863
    unative_t arg1, unative_t arg2, unative_t arg3, unative_t arg4)
1027 palkovsky 864
{
865
    call_t *call;
1040 palkovsky 866
    ipc_data_t saved_data;
1088 palkovsky 867
    int saveddata = 0;
1329 palkovsky 868
    int rc;
1027 palkovsky 869
 
1346 palkovsky 870
    /* Do not answer notification callids */
871
    if (callid & IPC_CALLID_NOTIFICATION)
872
        return 0;
873
 
1040 palkovsky 874
    call = get_call(callid);
875
    if (!call)
876
        return ENOENT;
1027 palkovsky 877
 
1088 palkovsky 878
    if (answer_need_old(call)) {
1040 palkovsky 879
        memcpy(&saved_data, &call->data, sizeof(call->data));
1088 palkovsky 880
        saveddata = 1;
1027 palkovsky 881
    }
882
 
883
    IPC_SET_RETVAL(call->data, retval);
884
    IPC_SET_ARG1(call->data, arg1);
885
    IPC_SET_ARG2(call->data, arg2);
2619 jermar 886
    IPC_SET_ARG3(call->data, arg3);
887
    IPC_SET_ARG4(call->data, arg4);
2620 jermar 888
    /*
889
     * To achieve deterministic behavior, zero out arguments that are beyond
890
     * the limits of the fast version.
891
     */
892
    IPC_SET_ARG5(call->data, 0);
1329 palkovsky 893
    rc = answer_preprocess(call, saveddata ? &saved_data : NULL);
1040 palkovsky 894
 
1027 palkovsky 895
    ipc_answer(&TASK->answerbox, call);
1329 palkovsky 896
    return rc;
1027 palkovsky 897
}
898
 
2471 jermar 899
/** Answer an IPC call.
900
 *
901
 * @param callid    Hash of the call to be answered.
902
 * @param data      Userspace address of call data with the answer.
903
 *
904
 * @return      Return 0 on success, otherwise return an error code.
905
 */
2619 jermar 906
unative_t sys_ipc_answer_slow(unative_t callid, ipc_data_t *data)
1027 palkovsky 907
{
908
    call_t *call;
1040 palkovsky 909
    ipc_data_t saved_data;
1088 palkovsky 910
    int saveddata = 0;
1288 jermar 911
    int rc;
1027 palkovsky 912
 
1346 palkovsky 913
    /* Do not answer notification callids */
914
    if (callid & IPC_CALLID_NOTIFICATION)
915
        return 0;
916
 
1040 palkovsky 917
    call = get_call(callid);
918
    if (!call)
919
        return ENOENT;
1027 palkovsky 920
 
1088 palkovsky 921
    if (answer_need_old(call)) {
1040 palkovsky 922
        memcpy(&saved_data, &call->data, sizeof(call->data));
1088 palkovsky 923
        saveddata = 1;
1027 palkovsky 924
    }
1288 jermar 925
    rc = copy_from_uspace(&call->data.args, &data->args,
2359 jermar 926
        sizeof(call->data.args));
1288 jermar 927
    if (rc != 0)
928
        return rc;
1027 palkovsky 929
 
1329 palkovsky 930
    rc = answer_preprocess(call, saveddata ? &saved_data : NULL);
1027 palkovsky 931
 
932
    ipc_answer(&TASK->answerbox, call);
933
 
1329 palkovsky 934
    return rc;
1027 palkovsky 935
}
936
 
2471 jermar 937
/** Hang up a phone.
1086 palkovsky 938
 *
2471 jermar 939
 * @param       Phone handle of the phone to be hung up.
940
 *
941
 * @return      Return 0 on success or an error code.
1086 palkovsky 942
 */
1780 jermar 943
unative_t sys_ipc_hangup(int phoneid)
1086 palkovsky 944
{
945
    phone_t *phone;
946
 
947
    GET_CHECK_PHONE(phone, phoneid, return ENOENT);
948
 
1591 palkovsky 949
    if (ipc_phone_hangup(phone))
1086 palkovsky 950
        return -1;
951
 
952
    return 0;
953
}
954
 
2471 jermar 955
/** Wait for an incoming IPC call or an answer.
1027 palkovsky 956
 *
2359 jermar 957
 * @param calldata  Pointer to buffer where the call/answer data is stored.
958
 * @param usec      Timeout. See waitq_sleep_timeout() for explanation.
959
 * @param flags     Select mode of sleep operation. See waitq_sleep_timeout()
960
 *          for explanation.
1364 jermar 961
 *
2471 jermar 962
 * @return      Hash of the call.
963
 *          If IPC_CALLID_NOTIFICATION bit is set in the hash, the
964
 *          call is a notification. IPC_CALLID_ANSWERED denotes an
965
 *          answer.
1027 palkovsky 966
 */
1780 jermar 967
unative_t sys_ipc_wait_for_call(ipc_data_t *calldata, uint32_t usec, int flags)
1027 palkovsky 968
{
969
    call_t *call;
970
 
3603 svoboda 971
restart:
972
 
973
#ifdef CONFIG_UDEBUG
974
    udebug_stoppable_begin();
975
#endif  
2359 jermar 976
    call = ipc_wait_for_call(&TASK->answerbox, usec,
977
        flags | SYNCH_FLAGS_INTERRUPTIBLE);
3603 svoboda 978
 
979
#ifdef CONFIG_UDEBUG
980
    udebug_stoppable_end();
981
#endif
1088 palkovsky 982
    if (!call)
983
        return 0;
1027 palkovsky 984
 
1258 palkovsky 985
    if (call->flags & IPC_CALL_NOTIF) {
986
        ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC));
1693 palkovsky 987
 
988
        /* Set in_phone_hash to the interrupt counter */
2098 decky 989
        call->data.phone = (void *) call->priv;
1693 palkovsky 990
 
991
        STRUCT_TO_USPACE(calldata, &call->data);
992
 
1258 palkovsky 993
        ipc_call_free(call);
994
 
2471 jermar 995
        return ((unative_t) call) | IPC_CALLID_NOTIFICATION;
1258 palkovsky 996
    }
997
 
1027 palkovsky 998
    if (call->flags & IPC_CALL_ANSWERED) {
1090 palkovsky 999
        process_answer(call);
1027 palkovsky 1000
 
1086 palkovsky 1001
        ASSERT(! (call->flags & IPC_CALL_STATIC_ALLOC));
1002
 
1003
        if (call->flags & IPC_CALL_DISCARD_ANSWER) {
1004
            ipc_call_free(call);
1005
            goto restart;
3476 jermar 1006
        } else {
1007
            /*
1008
             * Decrement the counter of active calls only if the
1009
             * call is not an answer to IPC_M_PHONE_HUNGUP,
1010
             * which doesn't contribute to the counter.
1011
             */
1012
            atomic_dec(&TASK->active_calls);
1086 palkovsky 1013
        }
1014
 
1015
        STRUCT_TO_USPACE(&calldata->args, &call->data.args);
1027 palkovsky 1016
        ipc_call_free(call);
1017
 
2471 jermar 1018
        return ((unative_t) call) | IPC_CALLID_ANSWERED;
1027 palkovsky 1019
    }
1086 palkovsky 1020
 
1027 palkovsky 1021
    if (process_request(&TASK->answerbox, call))
1022
        goto restart;
1086 palkovsky 1023
 
1090 palkovsky 1024
    /* Include phone address('id') of the caller in the request,
1025
     * copy whole call->data, not only call->data.args */
1396 palkovsky 1026
    if (STRUCT_TO_USPACE(calldata, &call->data)) {
4041 jermar 1027
        /*
1028
         * The callee will not receive this call and no one else has
1029
         * a chance to answer it. Reply with the EPARTY error code.
4040 decky 1030
         */
4041 jermar 1031
        ipc_data_t saved_data;
1032
        int saveddata = 0;
1033
 
1034
        if (answer_need_old(call)) {
1035
            memcpy(&saved_data, &call->data, sizeof(call->data));
1036
            saveddata = 1;
1037
        }
1038
 
1039
        IPC_SET_RETVAL(call->data, EPARTY);
1040
        (void) answer_preprocess(call, saveddata ? &saved_data : NULL);
1041
        ipc_answer(&TASK->answerbox, call);
1396 palkovsky 1042
        return 0;
1043
    }
1780 jermar 1044
    return (unative_t)call;
1027 palkovsky 1045
}
1258 palkovsky 1046
 
2471 jermar 1047
/** Connect an IRQ handler to a task.
1923 jermar 1048
 *
2471 jermar 1049
 * @param inr       IRQ number.
1050
 * @param devno     Device number.
1051
 * @param method    Method to be associated with the notification.
1052
 * @param ucode     Uspace pointer to the top-half pseudocode.
1923 jermar 1053
 *
2471 jermar 1054
 * @return      EPERM or a return code returned by ipc_irq_register().
1923 jermar 1055
 */
2359 jermar 1056
unative_t sys_ipc_register_irq(inr_t inr, devno_t devno, unative_t method,
1057
    irq_code_t *ucode)
1258 palkovsky 1058
{
1297 jermar 1059
    if (!(cap_get(TASK) & CAP_IRQ_REG))
1060
        return EPERM;
1061
 
1923 jermar 1062
    return ipc_irq_register(&TASK->answerbox, inr, devno, method, ucode);
1258 palkovsky 1063
}
1064
 
2471 jermar 1065
/** Disconnect an IRQ handler from a task.
1923 jermar 1066
 *
2471 jermar 1067
 * @param inr       IRQ number.
1068
 * @param devno     Device number.
1069
 *
1070
 * @return      Zero on success or EPERM on error..
1923 jermar 1071
 */
1072
unative_t sys_ipc_unregister_irq(inr_t inr, devno_t devno)
1258 palkovsky 1073
{
1297 jermar 1074
    if (!(cap_get(TASK) & CAP_IRQ_REG))
1075
        return EPERM;
1076
 
1923 jermar 1077
    ipc_irq_unregister(&TASK->answerbox, inr, devno);
1258 palkovsky 1078
 
1079
    return 0;
1080
}
1702 cejka 1081
 
3438 svoboda 1082
#include <console/console.h>
1083
 
1084
/**
1085
 * Syscall connect to a task by id.
1086
 *
1087
 * @return      Phone id on success, or negative error code.
1088
 */
1089
unative_t sys_ipc_connect_kbox(sysarg64_t *uspace_taskid_arg)
1090
{
1091
#ifdef CONFIG_UDEBUG
1092
    sysarg64_t taskid_arg;
1093
    int rc;
1094
 
1095
    rc = copy_from_uspace(&taskid_arg, uspace_taskid_arg, sizeof(sysarg64_t));
1096
    if (rc != 0)
1097
        return (unative_t) rc;
1098
 
3441 svoboda 1099
    LOG("sys_ipc_connect_kbox(%" PRIu64 ")\n", taskid_arg.value);
3438 svoboda 1100
 
1101
    return ipc_connect_kbox(taskid_arg.value);
1102
#else
1103
    return (unative_t) ENOTSUP;
1104
#endif
1105
}
1106
 
1757 jermar 1107
/** @}
1702 cejka 1108
 */